Detachable wheel-rim.



0. E. EDSTROM.

DETACHABLE WHEEL RIM. APPLICATION HLED Mln/9.1911.

1,2861, 173. Patented Nov. 26, 1918.

/A/VE/VTDH TT E. EDFTRM lo s a w IW OTTO E. EDSTKROM, OF OAKLAND, CALIFORNIA, ASSIGNOR TO RAPID 'BEMO'UNTABLIE RIM CWIPANY, 0F SAN FRANCISCO, CALIFORNIA, .A CORPORATION OF CALIFORNIA.

DETACHABLE WHEEL-RIM.

Specification of Letters Patent.

ratenta'nov. 26,1918.

Application led May 9, 19-17. Serial No. 167,583.

Be it known that l. Ori'o E.' llnsTnoir, a citizen ol the United States. residing at Oakland. in the county of Alameda and State ot' California. have invented new and uset'iil lmprovements in Detachable lVheelln the accompanying drawing, Figure 1-l a broken sectional view transverse to the axle ot' the wheel taken on the line 1-1 of Fig. 2; Fig. 2 is a broken plan view of the inner Fig. 4 is a detail sectional view on the line 4-4 of Fig. 2: Fig. 5 is a broken detail front view of the telly rim; Fig. (l is a sectional view on the line G-G of Fig. 5: Fig. 7 is a sectional view on the line. 7-7 ot Fig. 5.

Referring to the drawing. 1 indicates a vehicle wheel. of which the felly rim 2 has .in one side an outwardly extending flange 3. On the outer surface of said tell rim, and flush with said flange, are secur .d ribs 4 extending obliquely across the telly rim at an angle of approximately 45 with the flange.

Slidable upon said folly rim is a rim 6 carrying apneumatio tire 5 between external flanges 10 having on one side an inwardly extending flange 7. Ou the inner surt'ace of said rim are secured guides each comprising a cireuiirferentially extending portion 9 and two oblique terminal portions 1l. extending across the inner surface oi the rim at the same obliquity as the ribs 4, the l'ree ends oi' said oblique terminal poi'- tioiis abutting against the tlaiige 7. The t'ermiiial portions ot' the adjacent guides are spaced from each other at a distance slightly` `:Ireater than the lwidth ot' the ribs 4, so as to form guideways tor said ribs when the riin is slid up'on the telly rim. Since said ribs and guideways extend obliquely to the lelly and rim, it follows that the rim can only be slid upon the telly rim by being side, of the rim ot' the wheel; Fig. 3V is a plan view of the 'telly rim of the wheel;

turned at the same time, or, in other Words, by having a helical motion.

In the flangeless edge ofthe telly. rim is formed a recess 12 extending into said felly rim with the saine Obliquity as the ribs l, and. projecting through the rim, and extending inwardly therefrom, is an air tube 13, which, when the outer rim is moved helically around said inner rim, travels in the recess 12. Said air tube is strengthened by means of a casing 14 extending with the saine Obliquity from said tube to the flange 7, and being supported thereagainst, the front portion'of said casing surrounding said tube in order to strengthen the same.

Likewise, to reinforce the recess 12 there is secured about the inner portion and sides of the section of the 'telly 'rim containing said recess a thin shield or casing 16 having portions 17 lininfr the sides of said recess.

The tube 13 is so located in the rim that, when it enters the recess in the telly rim and moves tliereinto, the ribs upon the telly rim also register with the guideways of the rim, and the rim can be slid upon the felly rim.

After the rim has been slid upon the felly rim with a helical motion. the tlangeless edge of the felly rim abutting against the internal flange of the ring, it is secured 1nv place by diametrically opposite set screws '18 screwed in an axial direction through the interi'al flange 7 of the felly rim and reinforcements 19 of the guideways adjacent thereto. The inner ends of these screws 'are conical, and, when the screws are sulliciently screwed in, said inner ends abut against. a surface ofv said reinforcements which is beveled in two directions, so as not only ,to force the rim circuinferentiallw around the telly rim butl also to Wedge i tightly thereon, and thus prevent any circumferential motion of the rim-on the telly riin and therefore also any axial motion thereon.

The ribs` and guides are so arranged that the running of the wheel tends to drive the rim still 'tai'tlier upon the telly rini.

The set screws are rcducedland made angular at their outer ends iu order to be operated upon by a tool having a square end` and the adjacent flange 7 is recessed to receive said end.

The method of removing and replacing the rim will be obvious from the foregoing description.

1.- ln a vehicle wheel, a elly, a fixed rim on the felly, a removable rim,K one of said rims having oblique ribs formed thereon. Aand the other rim guides for said ribs7 and a screw carried b one of the rims having a taperin end a apted to engage one of the` ribs to ook the removable .rim against circumferential and lateral movement with relation to the fixed rim.

2. In a vehicle Wheel, a felly, a iXed rim on the felly, a removable rim, one of said rims having oblique ribs formed thereon and' the other rim guides for said ribs, annularly disposed guiding members interposed 'between the guides to guide the ribsl into the guides formed for the reception of the ribs, and a screw carried by one of the rims having a tapering end adapted to engage one oiE the ribs to look the removable rim `against. circumferential and lateral movement with relation to the fixed rim.

3. In a vehicle Wheel, a felly rim, a removable rim thereon,'one of said elements ha ving oblique ribs and the other oblique 2guides for said ribs, and a yscrew carried by the removable rim havingV a tapering end adapted to engage one of the ribs to lock the rim against circumferential and lateral movement.

4. In a vehicle wheel, a felly, a fixed rim on the felly, a removable rim thereon, a plurality of interspaced angularly positioned Wedge members formed on the fixed rim, said Wedge members tapering from end to end both in width and depth, angularly positioned grooves formed in the removable rim mea 1ra also tapering from end to end both in Width and depth to tit the Wedge members, and a screw carried by the removable rim having a tapering end adapted to engage one of the Wedge members to lock the removable rim against' eiremn'lerential vand lateral move ment with relation to the fixed rim.

' ln a vehicle Wheel, a folly, a. fixed rim on the fellyj a removable rim, one of said rims having oblique ribs :formed thereon and the other rim guides for said ribs, a screw Carried by one of the rims having a tapering end adapted to engage one of the ribs to look the removable rim against circumferential and lateral movement with relation to the fixed rim, and an annular inwardly projettingl Hange'formed on the removable rim adapted to engage the side of the telly to cover the ribs and guides formed on the ribs. 6. in a vehicle wheel, a elly, a fixed rim on the felly, a removable rim thereon, a plurality of interspared angular-ly positioned Wedge members formed on the xed rim, said Wedgemembers tapering from end to end both in Width and depth ai'igularly positioned grooves formed in the removable 'rim also taperingr from end to end both in Width and depth to fit the wedge members,

Ell

a horizontally positioned screw mounted in t the removable rim, and a tapering extension on the inner end of said screw adapted to 'engage a cam face formed on a wedge mem'- ber on the iixed rim to impart a circumferential movement to the removable rim to pull 'the rims together laterally and also positively lock said rims against 'circumferential and lateral movement `vvhen thev srrevv drawn up iight.

o'rro n. Energon. 

